The STANLEY STMT71653 145pc Mechanics Tool Set offers a complete range of SAE and metric-sized sockets and drive tools. Our socket sets combine the most popular tools for easy accessibility. Stanley drive tools are forged from high-quality steel and finished in high-polish nickel chrome or black chrome. Selected ratchet handles are ergonomically designed and have an easy-to-use, thumb-operated reverse-switch mechanism. Sockets and extensions remain locked onto the drive until disengaged with an easy-to-reach, low-profile quick-release button. Stanley sockets feature our Max-Drive design, a unique radius corner design that provides 15% more torque* to tighten fasteners easily and simplify the turning of rounded corners. Max-Drive helps reduce fastener wear by minimizing contact on the outer 5% of the fastener, helping to increase life expectancy. It also helps reduce slipping on frozen or rusted fasteners. All Stanley ratchets, sockets and wrenches are manufactured globally to Stanley specifications, meeting and often exceeding ANSI specifications